I'm on a five person family plan that we've had for over eight years so probably.
My current data selection is Unlimited Plus - $20 "Unlimited Data on the T-Mobile Network for social networking and navigating (up to 2GB of high speed included)."
I have the option of selecting 5GB for $15. "Adds 4GB to your included 1GB of high-speed data. Smartphone Mobile HotSpot Service included. Speeds slowed after 5GB." I selected it and went to review and it showed our monthly bill decreasing by $5.
